-53.4% is the change from 721 to 336
Calculation steps:
[( 336 - 721 ) ÷ 721] x 100 = -53.4%
Formula
Percentage change = [(336 - 721) / 721] x 100
Subtract the new number by the original number
336 - 721 = -385
-385 ÷ 721 = -0.5339805825242718
-0.5339805825242718 x 100 = -53.4%